32 lines
1.9 KiB
Markdown
32 lines
1.9 KiB
Markdown
# Indexing splits into a shared parse core and binding-specific persist layers
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**Context.** Obelisk had two divergent full indexers — `scripts/indexer.mjs`
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(791 lines, `node:sqlite`, for the skill/runtime) and `app/indexer.js` (1170
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lines, `better-sqlite3`, for the Electron app) — both parsing the same Claude and
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Codex JSONL into the same schema. Keeping two implementations contradicts the
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"single source of truth / infra" goal, but forcing one SQLite binding is also
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bad: `node:sqlite` is zero-native-dep and ideal for a clone-and-run skill
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artifact, while `better-sqlite3` is the battle-tested choice inside Electron.
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**Decision.** Unify at the logic layer, not the binding layer. Extract a pure
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**parse core** (`jsonl -> records`) with no database dependency, and keep two
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thin **persist layers** (`node:sqlite` for skill/CLI, `better-sqlite3` for the
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app) that consume the same records. The parse core is a **streaming iterator**
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(`parseJsonl(file, fromLine)` yielding records), not a batched `records[]`, to
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preserve the existing memory-friendly line-by-line indexing and the
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`lines_processed` resume-from-line semantics recorded in `index_state`.
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**Two indexing modes** share this parse core and differ only in trigger:
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**daemon indexing mode** (app/CLI watches and keeps the index fresh) and
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**passive pull mode** (skill indexes on invocation when no daemon is active).
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They never write concurrently because the passive mode detects a fresh daemon via
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heartbeat markers in `index_state` (**daemon arbitration**) and skips its own
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indexing.
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**Consequences.** Golden tests anchor on the parse core: feed a fixture JSONL,
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assert the yielded record sequence — independent of binding. The refactor's real
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work is disentangling parse from persist inside the current indexers, where
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prepared-statement writes are today interleaved into the parse loop. The app's
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richer incremental-discovery logic must be folded *into* the shared parse core,
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not dropped.
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